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Metal-Ligand Bonds

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Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

Chitosan as Support Material for Metal-Organic Framework based Catalysts.

Christia R Jabbour¹, Kordula B Schnabl¹, Haoxiang Yan¹

¹Inorganic Chemistry and Catalysis group, Debye Institute for Nanomaterials Science and Institute for Sustainable and Circular Chemistry, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry

|May 27, 2024

Summary

Chitosan beads effectively support a platinum-containing metal-organic framework (MOF) catalyst, especially when synthesized using a one-pot method. This demonstrates chitosan

Keywords:

chitosan composite material metal-organic framework synthesis

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Area of Science:

Materials Science
Catalysis
Green Chemistry

Background:

The chemical industry faces challenges in converting waste into valuable products.
Chitosan (CS), a biopolymer derived from chitin, is abundant, low-cost, and non-toxic.
Developing sustainable catalyst supports is crucial for eco-friendly chemical processes.

Purpose of the Study:

To evaluate chitosan beads as a support material for a zirconium-based Metal-Organic Framework (MOF) incorporating platinum (UiO-67-Pt).
To compare two synthesis methods for incorporating UiO-67-Pt into chitosan beads: one-pot synthesis (OPS) and post-synthetic functionalization (PSF).
To assess the potential of chitosan as a green, bead-shaped support for MOF catalysts.

Main Methods:

Chitosan was formed into beads (~3 mm).
UiO-67-Pt was incorporated into chitosan beads via one-pot synthesis (OPS) and post-synthetic functionalization (PSF).
Materials were characterized using Scanning Electron Microscopy (SEM), Ultraviolet-Visible (UV-Vis) spectroscopy, Infrared (IR) spectroscopy, and Thermogravimetric Analysis (TGA).

Main Results:

SEM images showed good UiO-67-Pt dispersion in chitosan beads synthesized via OPS (UiO-67-Pt-OPS@CS), but not via PSF (UiO-67-Pt-PSF@CS).
Spectroscopic analysis confirmed the successful incorporation of UiO-67-Pt in both composite materials.
TGA indicated higher thermal stability for UiO-67-Pt-OPS@CS compared to pure CS beads, while UiO-67-Pt-PSF@CS showed no significant improvement.

Conclusions:

Chitosan beads are a viable green support material for MOF catalysts.
The one-pot synthesis method offers superior dispersion and thermal stability for UiO-67-Pt@CS composites.
This research contributes to the development of sustainable catalysts from waste materials.